28 }

    28 }

    29 

    29 

    30 int main (int argc, char **argv)

    30 int main (int argc, char **argv)

    31 {

    31 {

    32     int i;

    32     int i;

    33     pthread_t thread;

    34     pthread_t thread;

    34 

    35 

    35     pthread_create (&thread, NULL, &thread_func, NULL);

    36     pthread_create (&thread, NULL, &thread_func, NULL);

    36 

    37 

    37     for (i = 0; i < 20; ++i) {

    38     for (i = 0; i < 20; ++i) {